Shuttle with yielding cop engaging side member



Feb. 20, 1940.- w. M. THOMSON 2,191,242

SHUTTLE WITH YIELDINC'r COP ENGAGING SIDE MEMBER Filed Aug. 4, 1939Patented Feb. 20, 1940 UNITED STATES SHUTTLE WITH YIELDING cor ENGAGINGSIDE MEMBER William M. Thomson, Richmond, Va., assignor to WortendykeManufacturing Company, Richmond, Va., a corporation of VirginiaApplication August 4, 1939, Serial No. 288,446

1 Claim.

This invention relates to shuttles for looms, and appertainsparticularly to shuttles in which the cop is tightly held.

In many types of weaving, as for example, where the yarn is coarse orstiff, and which peel off of the outside of the cop too freely, or whereit is desired to get the maximum quantity of yarn on the cop, the cop ismade of maximum dimension to tightly fit the shuttle chamber, into whichit has to be forced, the yarn being paid out from the interior of thecop.

In the case of paper yarns, these are so solidly incorporated in the copthat it is substantially incompressible and has to be driven into theshuttle with a mallet or the like. This procedure frequently splits theshuttle.

Then again, cops vary somewhat in diameter. One may be so small that itcannot be fitted tightly in the shuttle chamber; another so large thatit can only be inserted with the use of excessive force.

The present invention has for its object an improvement in shuttleswhich adapts them to tightly receive solidly wound cops, regardless ofsome variance in their diameter, and without the exercise of undue forcein inserting them into the shuttle.

A more specific object of the invention is to provide a shuttle with acop chamber having a resilient yielding side member adapted to yield tothe insertion of the cop, but to press the cop sufliciently'to hold itin fixed position in the shuttle.

Still another object of the invention is the provision of a yielding padof sponge rubber or the like on one side of the cop chamber, so that thecop may be conveniently inserted by rolling it down the rubber pad toits proper position in the cop chamber.

Other objects of the invention will appear, as the following descriptionof a preferred and practical embodiment thereof proceeds.

In the drawing throughout the several figures of which the samecharacters of reference have been employed to designate identical parts:

Figure 1 is a plan view of a shuttle embodying the features of thepresent invention; and

Figure 2 isa cross-section taken along the line 2-2 of Figure 1.

Referring now in detail to the several figures, the numeral I,represents the shuttle which may be made of wood, as is usual, or of anyother desired substance, and having the cop chamber 2. The referencecharacter 3 represents the cop, which by way of illustration, is woundwith paper yarn. The paper yarn is characterized by being coarse, sothat it is highly desirable, in order to avoid too rapid a sequence ofshuttle interchangements, to get as much yarn as possible on the cop.Consequently, the cop is wound to such a large diameter that it canonlybe inserted into the cop chamber by the exercise of force. The cop maybe so tightly wound as to be substantially incompressible, so that if itwere hammered into the cop chamber in the conventional shuttle, the riskof splitting the shuttle would be great.

In order to avoidthe disadvantages of having to force the cop into theshuttle by impact, I have provided one side of the shuttle chamber witha pad 4 of soft sponge rubber or the like. Said pad is substantially aslong as the cop, and preferably as wide as the depth of the cop chamber,or very nearly so. The side 5 of the shuttle chamber which is to receivethe pad 2 is preferably formed with a recess 6 undercutting the flangeI. The rubber pad 4 is preferably beveled or chamfered, as shown at 8,so as to form a reduced edge 9 which fits under the flange 1, beingprotected by said flange against being torn loose by the drag caused bythe insertion of the cop.

The rubber pad is preferably cemented in the recess 6.

The functioning of the yielding rubber pad will be obvious from Figure2. The cop is pressed into the open top of the shuttle chamber againstthe inclined edge 8 of the rubber pad, and forced into its operativeposition by compressing the pad, as shown. The surface of the pad issubstantially planiform throughout, and affords a tractive surface, thecoefiicient of friction of which is greater than the plain wood surfaceof the side In of the cop chamber. Consequently, upon the cop beingpressed down into the shuttle chamber, it rolls upon the surface of thepad, facilitating its entry intothe shuttle chamber, and preventing thepad from being dragged loose from its adhesive connection to the side ofthe shuttle. I i

It will be understood to those skilled in the art that while theinvention specifically illustrates and describes a pad of soft rubber,it is to be construed as sufficiently broad to include any yieldingmeans whose frictional coefficient is such, relative to that of theopposite side of the shuttle chamber, as to permit the cop to be rolledinto position.

While I have in the above description disclosed what I believe to be apreferred and practical embodiment of the invention, it will beunderstood to those skilled in the art that the details of constructionand the arrangement of parts, as shown and described, are by way ofexample, and not to be construed as limiting the scope of th appendedclaim. I

What I claim as my invention is: 1 Shuttle, recessed to form a copchamber, adapted to hold a cop in fixed position in the shuttle,

one side of said cop chamber being formed with a recess having aninwardly extending upper flange, and a yielding pad of material havinthe frictional characteristics of rubber seated in said recess havingits upper edge beveled to form a thin 5 edge overlain by said flange.

WILLIAM M. THOMSON.

